Electricity demand will likely stay well under the lower end of those estimates, but its good that estimating is done optimistically, given it means that level of demand is planned to be supported already.
So it's not like electricity demand is going to grow modestly within a declining energy demand environment (which opens up other opportunities) while nothing new is being built.
The American data-center hysteria is mostly due to the fact that Americans have made it impossible (and have lost a lot of the expertise needed) to build infrastructure, and their faster growing power demand is NOT being met with new supply. This was already happening decades ago, before factoring in AI. US infrastructure is massively underfunded and 60-80 years outdated in most areas due to poor government policy.